# stu = ["小明", "小红", "小心"]
# print(len(stu))
# i = 0
# while i < 4:
#     print(i)
#     i += 1
# for item in stu:
#     print(item)
# print(stu[-1])
# stu = ("小明", "小红", "小心")
# print(stu[-1])
# stu.insert(1, "小心")
# stu.append("1")
stu = (2, [12, 12])
stu[1][0] = 13
for item in stu:
    print(item)
